Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c9bea4f29dde7d0…

MALICIOUS

PDF

44.6 KB Authoring application: Nitro PDF
MD5: b1fa14429448a11621f3923f66347415 SHA-1: 33406e0c16687cfc3e0b4266f1dd091591d237fe SHA-256: 7c9bea4f29dde7d0a2bfa4ecc9994335555abaee5649604226e04fe6db6bee35
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a critical alert for a link farm and a ClamAV detection for phishing. The embedded content, though largely unreadable, contains references to 'Nitro PDF' and 'Adobe', suggesting a potential lure related to document software. The primary attack pattern involves directing users to a large number of external PDF files hosted on various domains, likely for SEO manipulation or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://mail.adenta.com/uploads/1/3/0/7/130740143/lepopeloruke.pdf
    • http://www.portlandveteransparade.com/uploads/1/3/0/7/130775386/9420532.pdf
    • http://koinlando.com/uploads/1/3/0/5/130589318/6e022577.pdf
    • http://wellnesslifestylelounge.com/uploads/1/3/0/4/130436441/1899162.pdf
    • http://patgrasso.com/uploads/1/3/0/2/130271043/0fe0dc787a25a2.pdf
    • http://vasudha-wellness.com/uploads/1/3/0/5/130588702/8235882.pdf
    • http://multicastaustralia.com/uploads/1/3/0/6/130639513/2338994.pdf
    • http://howtocleangraffiti.com/uploads/1/3/0/7/130775400/vopimib.pdf
    • http://onlinemobiletrainer.com/uploads/1/3/0/6/130605186/059a5.pdf
    • http://theusacommerce.com/uploads/1/3/0/3/130312973/tolixidolanewagoduwe.pdf
    • http://chores4sale.com/uploads/1/3/0/6/130604348/230163.pdf
    • http://gaskinsgadgets.com/uploads/1/3/0/5/130543279/5696532.pdf
    • http://mercedes-huff.com/uploads/1/3/0/2/130288401/782306d9.pdf
    • http://afterthefallinc.com/uploads/1/3/0/2/130273581/6aeef5cd20.pdf
    • http://sorteincorporation.co.za/uploads/1/3/0/2/130289311/suxamadagulimos-zavinezovu-nisito-garulagozovuvuv.pdf
    • http://rochecenter.org/uploads/1/3/0/2/130291910/130291910.html#learn+to+read+quran+arabic+to+english+transliteration
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_001_off00002a3e.bin
a80b5dad1bdbc8c937ae0a945c0a4b36b4c305d33af1e71511eb7ec56186a2ad		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A3E 23560 bytes
font_01_sfnt_off0000537a.bin
b972304ba92fc1e1a523ebf36ffc7c900d6e9ec47265f6dabe1cd86ac3eaf109		 pdf-font-stream PDF embedded font (sfnt) at offset 0x537A 8008 bytes

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